The Effect of Electrochemical and Gas Phase Activation of High Surface Area Carbon Black Ketjen Black EC 600 DJ on Its Surface Composition, Electrochemical Capacitance, and Stability

• Published in: Russian journal of electrochemistry Vol. 54; no. 5; pp. 426 - 432
• Main Authors: Maltseva, N. V., Golovin, V. A., Chikunova, Yu. O., Gribov, E. N.
• Format: Journal Article
• Language: English
• Published: Moscow Pleiades Publishing 01-05-2018; Springer Nature B.V
• Subjects: Activation; Capacitance; Carbon black; Chemistry; Chemistry and Materials Science; Electrochemical activation; Electrochemical oxidation; Electrochemistry; Physical Chemistry; Stability analysis; Surface properties; Surface stability; “start–stop” cycling; activated carbon; CVA; quinone–hydroquinone transitions
• ISSN: 1023-1935; 1608-3342
• DOI: 10.1134/S102319351805004X

The effect of electrochemical and gas-phase activation of high-surface-area carbon black Ketjen Black EC 600 DJ on its stability and electrochemical capacitance is studied. The electrochemical activation is carried out according to the “start–stop” protocol (1–1.5 V, 0.5 V/s). The stability of samples is assessed based on variation of their effective resistance (based on the results of cyclic voltammetry (CVA)) and electrochemical capacitance (based on CVA and galvanostatic data) with the cycle number. The changes in the texture and surface properties of activated samples are studied by the methods of nitrogen low-temperature adsorption and X-ray photoelectron spectroscopy. The gas-phase activation of high-surface-area carbon black Ketjen Black EС 600 DJ is shown to impair its stability, while the electrochemical oxidation of carbonblack samples leads to a considerable (two-fold) increase in their electrochemical capacitance.